Bow pull and arrow length indicator

ABSTRACT

A bow pull and arrow length indicator to permit selecting the proper bow &#39;&#39;&#39;&#39;weight,&#39;&#39;&#39;&#39; or strength, and the proper arrow length for a given archer. The indicator is in the form of a bow simulated handle provided with a simulated arrow rod slidably displaceable relatively to the handle. A coil spring is disposed around the arrow rod, and the &#39;&#39;&#39;&#39;weight&#39;&#39;&#39;&#39; of the bow is simulated by means of an adjustable abutment on the end of a coil spring. The archer pulls the arrow rod to his anchor point to a full draw, thus compressing the spring between the adjustable abutment means and a fixed abutment dependent from the handle. Various bow weights are simulated by varying the force exerted by the spring against the archer&#39;&#39;s full draw, as a result of setting the coil spring adjustable abutment means longitudinally on the arrow rod along a scale calibrated in bow weights. After selecting a comfortable bow weight, the correct arrow length is determined at full draw by reading the proper arrow length on a scale engraved on the arrow rod.

United States Patent 1 Garot et a1.

[ BOW PULL AND ARROW LENGTH INDICATOR [76] Inventors: Lawrence F. Garot, 115 Jefferson, Green Bay, Wis. 54300; Laurence W. Armstrong, PO. Box 100, Oconto Falls, Wis. 54154 [22] Filed: Aug. 17, 1971 [21] Appl. No.: 172,450

Primary ExaminerRichard C. Queisser Assistant Examiner-Stephen A. Kreitman Attorney-Robert C. l-lauke et al.

[ 1 Oct. 2, 1973 [57] ABSTRACT A bow pull and arrow length indicator to permit selecting the proper bow weight, or strength, and the proper arrow length for a given archer. The indicator is in the form of a bow simulated handle provided with a simulated arrow rod slidably displaceable relatively to the handle. A coil spring is disposed around the arrow rod, and the weight of the bow is simulated by means of an adjustable abutment on the end of a coil spring. The archer pulls the arrow rod to his anchor point to a full draw, thus compressing the spring between the adjustable abutment means and a fixed abutment dependent from the handle. Various bow weights are simulated by varying the force exerted by the spring against the archers full draw, as a result of setting the coil spring adjustable abutment means longitudinally on the arrow rod along a scale calibrated in bow weights. After selecting a comfortable bow weight, the correct arrow length is determined at full draw by reading the proper arrow length on a scale engraved on the arrow rod.

14 Claims, 4 Drawing Figures PATENTED 2 I975 INVENTORS LAWRENCE F- GAROT LAURENCE W. ARMSTRONG BY W g paa z;

ATTORNEYS BOW PULL AND ARROW LENGTH INDICATOR BACKGROUND OF THE INVENTION in order to draw the bow string to an anchor point or' full draw. Conventionally a bow may be purchased in any weight varying, by increments of lbs., from 30 to 65 lbs. and a correct bow weight is usually selected by an archer experimentally by drawing bows of different weights until one is found which the archer is capable of drawing to his anchor point repeatedly and without discomfort. A suitable arrow length must alsobe selected, and proper arrow lengths may vary considerably from one person to another, even though they are able to draw bows of the same weight, in view of the difference in arm length between different persons.

The present invention permits to quickly and conveniently fit a person with a suitable bow of appropriate weight and permits to determine the appropriate arrow length suitable for that person. The present invention is therefore a convenient sales aid permitting the rapid and accurate determination of the proper bow weight and arrow length suitable for an archer. Such desirable results are accomplished by the invention by combining in a single unit a bow pull and arrow length indicator wherein the bow weight is simulated in conventional finite increments until a comfortable full draw to the archers anchor point is determined, and which displays the appropriate arrow length directly on a scale engraved on the arrow rod.

BRIEF DESCRIPTION OF THE DRAWINGS The many objects and advantages of the present invention will be apparent to those skilled in the art when the following description of the best mode contemplated for practicing the invention is read in conjunction with the accompanying drawings wherein:

FIG. 1 is a view of the bow pull and arrow length indicator of the invention, shown in use;

FIG. 2 is an enlarged view of a portion of the arrow rod of the bow pull and arrow length indicator of FIG. 1; I

FIG. 3 is an enlarged view of a portion of. the arrow rod showing the arrow length scale thereon; and

FIG. 4 is a transverse sectional view of the arrow rod as seen from line 44 of FIG. 2.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT As shown in FIG. 1, the bow pull and arrow length rod disposed at right angle at the end of the arrow rod and welded, soldered or otherwise fastened thereon.

The handle 10 has a bracket or brace member 20, made of a flat elongated piece of metal attached to the rearward portion of the handle by way of screws 21 and shaped with two angularly disposed portions connected at their apex by means of an integral straight portion 22 having an aperture 24 through which the arrow rod I6 is normally slidably disposed. A coil spring 26 is disposed around the arrow rod 16 with one end abutting against the portion 22 of the brace member 20 and theother end engaging the side surface of an abutment in the form of a tab 28 adjustably disposed about the portion of the arrow rod 16 projecting from the handle.

As shown in more detail in FIG. 2, the projecting portion of the arrow rod 16 is provided with indicia 34 etched, engraved, or otherwise applied to the surface of the arrow rod at regular intervals, each of the indicia beingv disposed proximate a groove 36 formed on the periphery of the arrow rod 16 such that the tab 28 may be longitudinally placed at any position corresponding to one of such grooves 36. The tab 28 has a generally half-circular aperture 30 (FIGS. 2 and 4) of a diameter corresponding to the reduced diameter portion of the arrow rod at each groove 36, the aperture 30 being connected with a generally half-circular aperture 32 of a diameter corresponding to the diameter of the arrow rod 16, such that the tab 28 may be longitudinally manually displaced along the arrow rod 16 with the body of the arrow rod engaged in the larger diameter aperture 32 and locked in any groove 36 by pulling the tab transversely so as to engage the smaller diameter aperture 30 of the tab into the appropriate groove 36. Any convenient adjustable abutment means may be used instead of the tab 28 such as, for example, a collar provided with a set screw engageable into the groove 36. The series of indicia 34 provides a bow weight scale 37,

or bow strength scale, in 5 lb. increments, for example from 30 to 65 lbs. The end of the arrow rod 16 may be provided, for the sake of safety, with a rubber, or the like, blunt bumper as shown at 39.

Prior to using the bow pull and arrow length indicator of the invention as a sales aid for the purpose of fitting an archer with a proper bow of a predetermined weight, the tab 28 is located into a groove 36 to a position corresponding to an approximate bow weight for the archer, and the archer, holding the handle 10 in one hand, with the fingers of his other hand engaged over the finger grip or simulated bow string 18, draws the arrow rod against the pressure of the coil spring 26 to his anchor point or full draw. Several draws, with the tab 28 disposed at different longitudinal positions corresponding to diverse bow weights, are tested by the archer until a detennination is made of the most comfortable bow weight selection for his purpose. After the archers correct bow weight is obtained, the archer draws the simulated arrow to his anchor point and the correct arrow length is read on a scale engraved, etched or otherwise formed on the periphery of the arrow rod 16, as shown at 38 in FIG. 1. As illustrated in greater detail in FIG. 3, the portion of the arrow rod 16 normally projecting between the handle 10 and the finger grip 18 when at full draw bears a scale 38 calibrated in arrow lengths expressed in inches, from 24 in. to 34 in. for example, asshown at 40. The proper arrow length is indicated by the highest number 40 visible next to the straight portion 22 of the brace member 20. Preferably,

a tiltable sliding wedge locking member, as shown at 42 in FIG. 1, is used to maintain the arrow rod 16 drawn to the archer's anchor point, so as to facilitate reading of the'arrow length scale 38. The locking member 42 is L-shaped and is provided with a circular aperture slightly larger than the arrow rod diameter. When the arrow rod is drawn by the archer to his anchor point, the locking member 42 is manually slid along the arrow rod 16 by the salesman until its forward projecting portion 44 abuts against the brace member 20, or it may be allowed to drop in such a position as a result of the archer tilting downwardly the tip 39 of the arrow rod 16.

It can thus be seen that the invention provides a bow pull and arrow length indicator permitting to determine the bow weight and the arrow length most suitable for a given archer.

Having thus described the invention by way of a typical example thereof, modifications whereof will be obvious to those skilled in the art, what is claimed as new l. A bow pull indicator comprising a bow handle, an arrow rod displaceable relative to said handle along an axis substantially perpendicular to the axis of said handle, finger grip means on one end of said arrow rod, spring bias means opposing displacement of said arrow rod relatively to said handle and spring bias adjusting means for adjustably varying the amount of force necessary to displace said arrow rod relatively to said handle to an archers full draw position, said spring bias adjustment means comprising first means affixing an end of said spring bias means to said handle and second means adjustably attaching the other end of said spring bias means to one of a plurality of attachment points on said arrow rod.

2. The bow pull indicator of claim 1 further comprising graduations on said arrow rod for providing an indication of a correct arrow length corresponding to said full draw.

3. The bow pull indicator of claim I wherein said second means of said spring bias adjusting means comprises a tab longitudinally movable along said arrow rod and engageable in one of a plurality of regularly spaced peripheral grooves on said arrow rod for adjustably varying the spring rate of said spring bias means.

4. The bow pull indicator of claim 1 wherein said spring bias means is a coil spring disposed around said arrow rod.

5. The bow pull indicator of claim 2 further comprising locking means for holding said arrow rod at said full draw position. 1

6. A bow pull and arrow length indicator comprising a handle, an arrow rod slidably extending through said handle, bow string simulating finger grip means on one end of said arrow rod,'longitudinally adjustable abutment means proximate the other end of said arrow rod, a spring disposed between fixed abutment means dependent from said handle and said adjustable abutment means, a first scale graduated in units of length on said arrow rod for providing an indication of a correct arrow length when said arrow rod is manually pulled by an archer to a full draw, against the force of said spring, and a second scale graduated in units of bow strength disposed on said arrow rod for cooperation with said adjustable abutment means for providing an indication of the force exerted for pulling said arrow rod to a full draw according to the longitudinal position of said adjustable abutment means.

7. The bow pull and arrow length indicator of claim 6 further comprising a bracket mounted on said handle, and wherein said arrow rod slidably extends through said handle and bracket and said spring is a coil spring disposed around said arrow rod between said bracket and said adjustable abutment means.

8. The bow pull and arrow length indicator of claim 7 wherein said adjustable abutment means comprises an apertured tab disposed around said arrow rod and clamping means adapted to clamp said tab to said arrow rod.

9. The bow pull and arrow length indicator of claim 8 wherein said clamping means comprises a reduced diameter portion in the aperture in said tab and peripheral grooves on said arrow rod engageable by said reduced diameter portion.

10. The bow pull and arrow length indicator of claim 6 further comprising locking means for maintaining said arrow rod to said full draw position.

11. An arrow length indicator comprising a handle, an arrow rod slidably extending through said handle, bow string simulating finger grip means on one end of said arrow rod, first abutment means proximate the other end of said arrow rod, a spring disposed between second abutment means dependent from said handle and said first abutment means, a scale graduated in units of length on said arrow rod for providing an indication of a correct arrow length when said arrow rod is manually pulled by an archer to a full draw against the force of said spring, and a bracket mounted on said handle, wherein said arrow rod slidably extends through said handle and bracket and said spring is a coil spring disposed around said arrow rod between said bracket and said first abutment means.

12. The arrow length indicator of claim 11 wherein said first abutment means is an adjustable abutment means comprising an apertured tab disposed around said arrow rod and clamping means adapted to clamp said tab to said arrow rod.

13. The arrow length indicator of claim 12 wherein said clamping means comprises a reduced diameter portion in the aperture in said tab and peripheral grooves on said arrow rod engageable by said reduced diameter portion, each of said grooves being graduated in units of bow strength.

14. The arrow length indicator of claim 11 further comprising locking means for maintaining said arrow rod to said full draw position.

Patent NOQ $762322 October 2. 1973 Dated Inventofls) LAWRENCE F0 GAROT ET AL It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

IN THE SPECIFICATION Column 2, line 12, change theother" to the other line 64, change "34 in." to

Signed and sealed this 19th day-of February 197).

(SEAL) Attest:

EDWARD M.FLETGHBR,JRQ C. MARSHALL DANN Attesting Officer Commissioner of Patents ORM PO-105O (10-69) USCOMM-DC GOING-P69 r us. GOVERNMENT PRINTI NG OFFICE mu o-zum-azsa, 

1. A bow pull indicator comprising a bow handle, an arrow rod displaceable relative to said handle along an axis substantially perpendicular to the axis of said handle, finger grip means on one end of said arrow rod, spring bias means opposing displacement of said arrow rod relatively to said handle and spring bias adjusting means for adjustably varying the amount of force necessary to displace said arrow rod relatively to said handle to an archer''s full draw position, said spring bias adjustment means comprising first means affixing an end of said spring bias means to said handle and second means adjustably attaching the other end of said spring bias means to one of a plurality of attachment points on said arrow rod.
 2. The bow pull indicator of claim 1 further comprising graduations on said arrow rod for providing an indication of a correct arrow length corresponding to said full draw.
 3. The bow pull indicator of claim 1 wherein said second means of said spring bias adjusting means comprises a tab longitudinally movable along said arrow rod and engageable in one of a plurality of regularly spaced peripheral grooves on said arrow rod for adjustably varying the spring rate of said spring bias means.
 4. The bow pull indicator of claim 1 wherein said spring bias means is a coil spring disposed around said arrow rod.
 5. The bow pull indicator of claim 2 further comprising locking means for holding said arrow rod at said full draw position.
 6. A bow pull and arrow length indicator comprising a handle, an arrow rod slidably extending through said handle, bow string simulating finger grip means on one end of said arrow rod, longitudinally adjustable abutment means proximate the other end of said arrow rod, a spring disposed between fixed abutment means dependent from said handle and said adjustable abutment means, a first scale graduated in units of length on said arrow rod for providing an indication of a correct arrow length when said arrow rod is manually pulled by an archer to a full draw, against the force of said spring, and a second scale graduated in units of bow strength disposed on said arrow rod for cooperation with said adjustable abutment means for providing an indication of the force exerted for pulling said arrow rod to a full draw according to the longitudinal position of said adjustable abutment means.
 7. The bow pull and arrow length indicator of claim 6 further comprising a bracket mounted on said handle, and wherein said arrow rod slidably extends through said handle and bracket and said spring is a coil spring disposed around said arrow rod between said bracket And said adjustable abutment means.
 8. The bow pull and arrow length indicator of claim 7 wherein said adjustable abutment means comprises an apertured tab disposed around said arrow rod and clamping means adapted to clamp said tab to said arrow rod.
 9. The bow pull and arrow length indicator of claim 8 wherein said clamping means comprises a reduced diameter portion in the aperture in said tab and peripheral grooves on said arrow rod engageable by said reduced diameter portion.
 10. The bow pull and arrow length indicator of claim 6 further comprising locking means for maintaining said arrow rod to said full draw position.
 11. An arrow length indicator comprising a handle, an arrow rod slidably extending through said handle, bow string simulating finger grip means on one end of said arrow rod, first abutment means proximate the other end of said arrow rod, a spring disposed between second abutment means dependent from said handle and said first abutment means, a scale graduated in units of length on said arrow rod for providing an indication of a correct arrow length when said arrow rod is manually pulled by an archer to a full draw against the force of said spring, and a bracket mounted on said handle, wherein said arrow rod slidably extends through said handle and bracket and said spring is a coil spring disposed around said arrow rod between said bracket and said first abutment means.
 12. The arrow length indicator of claim 11 wherein said first abutment means is an adjustable abutment means comprising an apertured tab disposed around said arrow rod and clamping means adapted to clamp said tab to said arrow rod.
 13. The arrow length indicator of claim 12 wherein said clamping means comprises a reduced diameter portion in the aperture in said tab and peripheral grooves on said arrow rod engageable by said reduced diameter portion, each of said grooves being graduated in units of bow strength.
 14. The arrow length indicator of claim 11 further comprising locking means for maintaining said arrow rod to said full draw position. 